package cn.icast.netty.c1;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoop;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringDecoder;

public class HelloServer {
    public static void main(String[] args) {
        // 1.启动器，负责组装netty组件，启动服务器
        new ServerBootstrap()
                //2.BossEventLoop ,WorkerEventLoop(selector,Thread)多监测连接事件，group组里面包含了线程和选择器
                .group(new NioEventLoopGroup())
                //3.选择服务器的ServerSocketChannel实现
                .channel(NioServerSocketChannel.class)//OIO BIO
                //4.boss  负责处理连接worker(child) 负责处理读写，worker（child）能执行哪些操作(handler)
                .childHandler(
                        //5. channel代表和客户端进行数据读写的通道Initializer初始化，负责添加别的handler
                        new ChannelInitializer<NioSocketChannel>() {
                            @Override
                    protected void initChannel(NioSocketChannel ch) throws Exception {
                        //6.添加具体的handler
                        ch.pipeline().addLast(new StringDecoder());//将ByteBuf转换未字符串
                        ch.pipeline().addLast(new ChannelInboundHandlerAdapter(){// 自定义handler
                            @Override  //处理读事件
                            public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
                               //打印上一步转换好的字符串
                                System.out.println(msg);
                            }
                        });
                    }
                })
                //7. 绑定监听端口
                .bind(8080);

    }
}
